On p. 143 of the February issue, Eric Niiler's story, “FDA, researchers consider first transgenic fish,” erroneously stated that a study to assess the effect of transgenic fish on wild populations was funded by the FDA. This study was actually funded by the US Department of Agriculture.

On p. 261 of the March issue, an incorrect title, “Combinational chemistry gives cell biology some muscle,” was printed for the News and Views by Dennis Hall. The title should have read “Combinatorial chemistry gives cell biology some muscle.” Nature Biotechnology apologizes to Dr. Hall for introducing this error.

On p. 390 of the April issue, the brain scan appears courtesy of David Borsook and Leno Becerra of the Center for Functional Pain Neuroimaging and Therapy Research, Department of Radiology, Massachusetts General Hospital (Cambridge, MA).